CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 238 · 40 questions

Code tip (Red, green, blue): rgb(red, green, blue): each from 0 to 255. #rrggbb: the same three numbers in hex. Hex digits: 0–9, then a = 10, b = 11, c = 12, d = 13, e = 14, f = 15. A pair = 16 × first digit + second digit: ff = 16 × 15 + 15 = 255.

1. 1.🌈 Which colour is rgb(255, 0, 0)? (a) red (b) white (c) blue (d) cyan
2. 2.🌈 In #003800 the green part is the hex number 38. What is it as a normal number?
3. 3.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) blue (c) black (d) green
4. 4.🌈 Which colour is #ffff00? (a) red (b) cyan (c) white (d) yellow
5. 5.🌈 Which hex code is bright green? (a) #000000 (b) #ff0000 (c) #00ffff (d) #00ff00
6. 6.🌈 Which colour is rgb(255, 255, 0)? (a) blue (b) yellow (c) white (d) red
7. 7.🌈 Which hex code is magenta? (a) #ffffff (b) #ff00ff (c) #ff0000 (d) #00ffff
8. 8.🌈 Which colour is rgb(0, 255, 255)? (a) red (b) cyan (c) yellow (d) white
9. 9.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) white (c) blue (d) red
10. 10.🌈 In #000071 the blue part is the hex number 71. What is it as a normal number?
11. 11.🌈 Which colour is rgb(0, 255, 0)? (a) red (b) cyan (c) black (d) bright green
12. 12.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) G (c) J (d) F
13. 13.🌈 In #00f500 the green part is the hex number f5. What is it as a normal number?
14. 14.🌈 Which colour is #ffffff? (a) magenta (b) cyan (c) white (d) bright green
15. 15.🌈 Which colour of light is strongest in rgb(166, 49, 105)? (a) green (b) blue (c) red
16. 16.🌈 Which colour is #000000? (a) red (b) cyan (c) black (d) bright green
17. 17.🌈 Which colour of light is strongest in rgb(39, 185, 125)? (a) red (b) green (c) blue
18. 18.🌈 In #980000 the red part is the hex number 98. What is it as a normal number?
19. 19.🌈 Which colour is rgb(0, 0, 0)? (a) yellow (b) red (c) black (d) white
20. 20.🌈 Which colour is rgb(0, 0, 255)? (a) bright green (b) red (c) white (d) blue
21. 21.🌈 Which colour is #ff00ff? (a) red (b) black (c) magenta (d) blue
22. 22.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 1000 (c) 255 (d) 99
23. 23.🌈 In #007a00 the green part is the hex number 7a. What is it as a normal number?
24. 24.🌈 Which hex code is cyan? (a) #ffffff (b) #ff0000 (c) #00ffff (d) #00ff00
25. 25.🌈 Which colour is #00ffff? (a) blue (b) cyan (c) yellow (d) red
26. 26.🌈 Which colour is #ff0000? (a) black (b) magenta (c) blue (d) red
27. 27.🌈 In #000055 the blue part is the hex number 55. What is it as a normal number?
28. 28.🌈 Which colour of light is strongest in rgb(71, 192, 101)? (a) red (b) green (c) blue
29. 29.🌈 In #000097 the blue part is the hex number 97. What is it as a normal number?
30. 30.🌈 In #3a0000 the red part is the hex number 3a. What is it as a normal number?
31. 31.🌈 In #bb0000 the red part is the hex number bb. What is it as a normal number?
32. 32.🌈 In #f20000 the red part is the hex number f2. What is it as a normal number?
33. 33.🌈 Which colour of light is strongest in rgb(107, 53, 168)? (a) red (b) blue (c) green
34. 34.🌈 Which colour of light is strongest in rgb(63, 38, 204)? (a) green (b) blue (c) red
35. 35.🌈 Which hex code is red? (a) #00ff00 (b) #000000 (c) #ff00ff (d) #ff0000
36. 36.🌈 Which colour of light is strongest in rgb(130, 187, 49)? (a) red (b) blue (c) green
37. 37.🌈 Which colour is #00ff00? (a) magenta (b) bright green (c) white (d) black
38. 38.🌈 In #0000f7 the blue part is the hex number f7. What is it as a normal number?
39. 39.🌈 Which colour is #0000ff? (a) red (b) blue (c) cyan (d) white
40. 40.🌈 Which colour of light is strongest in rgb(27, 218, 125)? (a) blue (b) red (c) green

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